公开(公告)号：WO2012009278A1

公开(公告)日：2012-01-19

申请号：PCT/US2011/043566

申请日：2011-07-11

Applicant: APPLE INC. ,  YOU, Chenhua ,  DROLET, Jean-Jacques, Philippe ,  CHEN, Wei

Inventor： YOU, Chenhua ,  DROLET, Jean-Jacques, Philippe ,  CHEN, Wei

IPC: G09G3/34 ,  H05B33/08 ,  G02F1/13357

CPC classification number: G09G3/3413 ,  G09G3/3426 ,  G09G2320/0242 ,  G09G2320/041 ,  G09G2320/043 ,  G09G2320/048 ,  G09G2320/0606 ,  G09G2320/064 ,  G09G2320/0666 ,  G09G2360/145 ,  H05B33/0857

Abstract: Systems, methods, and devices are provided for maintaining a target white point on a light emitting diode (LED) based backlight 32. In one embodiment, the backlight 32 may include two or more groups of LEDs 48, 78, each driven at a respective driving strength. Each group may include LEDs 48, 78 of a different chromaticity, and the respective driving strengths may be adjusted, for example, by varying the duty cycles, to maintain the target white point. To ensure that the white point may be maintained over an operational temperature range of the backlight 32, the LEDs 48, 78 may be selected so that the chromaticities of each group of LEDs 48, 78 are separated by at least a minimum chromaticity difference. Further, the LEDs 48, 78 may be selected so that at the equilibrium temperature of the backlight 32, the LEDs 48, 78 may produce the target white point when driven at substantially equal driving strengths.

Abstract translation: 提供了用于在基于发光二极管（LED）的背光源32上维持目标白点的系统，方法和装置。在一个实施例中，背光源32可以包括两组或更多组LED 48,78，每组驱动在相应的 驾驶实力。 每个组可以包括不同色度的LED 48,78，并且可以例如通过改变占空比来调整相应的驱动强度，以维持目标白点。 为了确保在背光源32的工作温度范围内保持白点，可以选择LED 48,78，使得每组LED 48,78的色度至少分开最小色度差。 此外，可以选择LED 48,78，使得在背光源32的平衡温度下，当以基本相等的驱动强度驱动时，LED 48,78可以产生目标白点。

公开(公告)号：WO2017184406A1

公开(公告)日：2017-10-26

申请号：PCT/US2017/027258

申请日：2017-04-12

Applicant: APPLE, INC.

Inventor： CHEN, Cheng ,  WU, Jiaying ,  ZHANG, Lu ,  DOYLE, David, A. ,  GLAZOWSKI, Christopher, E. ,  HERRANZ, Adria, Fores ,  YOU, Chenhua ,  CHEN, Wei ,  QI, Jun ,  ZHONG, John, Z.

IPC: G02F1/1335 ,  G09G3/34

CPC classification number: H05B33/0872 ,  G02F1/133621 ,  G02F2001/133614 ,  G09G3/3413 ,  G09G2320/0666 ,  G09G2360/144

Abstract: An electronic device is provided with a display (14) having a backlight (88) with light sources (82-1..82-N) of different colors. The electronic device includes a color ambient light sensor (20) that measures the color of ambient light and control circuitry (30) that adjusts the color of light emitted from the backlight based on the color of ambient light. The light sources may include at least first and second light-emitting diodes that emit light having different color temperatures. The control circuitry may adjust the intensity of light emitted from the first light-emitting diode relative to the intensity of light emitted from the second light-emitting diode to produce a backlight color that more closely matches the color of ambient light. The first and second light-emitting diodes may include an ultraviolet light-emitting diode die and a blue light-emitting diode die coated with red and green phosphors and mounted in a common semiconductor package.

Abstract translation: 电子设备设置有具有带有不同颜色的光源（82-1..82-N）的背光源（88）的显示器（14）。 该电子设备包括测量环境光的颜色的颜色环境光传感器（20）和基于环境光的颜色来调节从背光发射的光的颜色的控制电路（30）。 光源可以包括发射具有不同色温的光的至少第一和第二发光二极管。 控制电路可以调节从第一发光二极管发射的光的强度相对于从第二发光二极管发射的光的强度，以产生更接近环境光的颜色的背光颜色。 第一和第二发光二极管可以包括紫外发光二极管裸片和涂有红色和绿色磷光体并安装在普通半导体封装中的蓝色发光二极管裸片。

公开(公告)号：WO2016171911A1

公开(公告)日：2016-10-27

申请号：PCT/US2016/026250

申请日：2016-04-06

Applicant: APPLE INC.

Inventor： PU, Chuan ,  LU, Shin-Ying ,  YOU, Chenhua ,  WANG, Sheng, Min ,  QI, Jun ,  YIN, Victor, H.

IPC: G02F1/13357 ,  G02B6/00

CPC classification number: G02B6/004 ,  G02B6/0011 ,  G02B6/0043 ,  G02B6/005 ,  G02B6/0051 ,  G02B6/0055 ,  G02B6/0061 ,  G02B6/0065 ,  G02B6/0068 ,  G02B6/0073 ,  G02B6/0083 ,  G02F1/133605 ,  G02F1/133609 ,  G02F1/133615

Abstract: A display may have an array of pixels that display images for a user. The backlight unit (42) may have a light-guide layer (78). An array of light-emitting diodes (72) may emit light (74) into an edge of the light-guide layer. The light guide layer may overlap a backlight reflector (80). The backlight reflector may include a backlight reflector panel (80-2) formed from a stack of dielectric layers on a rectangular substrate. The backlight reflector may also include a strip of backlight reflector tape (80-1) having an edge that is overlapped by an edge portion of the backlight reflector panel. Colour compensating features such as printed colored ink patterns may be formed on the backlight reflector to adjust the color of backlight illumination in portions of the backlight unit adjacent to the light-emitting diodes.

Abstract translation: 显示器可以具有显示用户的图像的像素阵列。 背光单元（42）可以具有导光层（78）。 发光二极管（72）的阵列可以将光（74）发射到导光层的边缘。 导光层可以与背光反射器（80）重叠。 背光反射器可以包括由矩形基板上的电介质层堆叠形成的背光反射板（80-2）。 背光反射器还可以包括具有与背光反射板的边缘部分重叠的边缘的背光反射带（80-1）条带。 可以在背光反射器上形成诸如印刷的彩色油墨图案的颜色补偿特征，以便在与发光二极管相邻的背光单元的部分中调节背光照明的颜色。

公开(公告)号：EP2593933A1

公开(公告)日：2013-05-22

申请号：EP11732561.3

申请日：2011-07-11

Applicant: Apple Inc.

Inventor： YOU, Chenhua ,  DROLET, Jean-Jacques, Philippe ,  CHEN, Wei

IPC: G09G3/34 ,  H05B33/08 ,  G02F1/13357

CPC classification number: G09G3/3413 ,  G09G3/3426 ,  G09G2320/0242 ,  G09G2320/041 ,  G09G2320/043 ,  G09G2320/048 ,  G09G2320/0606 ,  G09G2320/064 ,  G09G2320/0666 ,  G09G2360/145 ,  H05B33/0857

Abstract: Systems, methods, and devices are provided for maintaining a target white point on a light emitting diode (LED) based backlight 32. In one embodiment, the backlight 32 may include two or more groups of LEDs 48, 78, each driven at a respective driving strength. Each group may include LEDs 48, 78 of a different chromaticity, and the respective driving strengths may be adjusted, for example, by varying the duty cycles, to maintain the target white point. To ensure that the white point may be maintained over an operational temperature range of the backlight 32, the LEDs 48, 78 may be selected so that the chromaticities of each group of LEDs 48, 78 are separated by at least a minimum chromaticity difference. Further, the LEDs 48, 78 may be selected so that at the equilibrium temperature of the backlight 32, the LEDs 48, 78 may produce the target white point when driven at substantially equal driving strengths.

Abstract translation: 提供了用于在基于发光二极管（LED）的背光源上维持目标白点的系统，方法和装置。 在一个实施例中，背光源可以包括两组或更多组LED，每组LED以相应的驱动强度驱动。 每个组可以包括不同色度的LED，并且可以例如通过改变占空比来调整相应的驱动强度，以维持目标白点。 为了确保在背光源的工作温度范围内保持白点，可以选择LED，使得每组LED的色度至少分开最小色度差。 此外，可以选择LED，使得在背光源的平衡温度下，当以基本上相等的驱动强度驱动时，LED可以产生目标白点。